Methods X-ray dental film and panoramic pantomogram were used to determine the location of embedded supernumerary teeth on bases of the geometrical principle of X-xay photography.
方法拍摄X
牙片及全景片,结合临床检查,利用X射
照相中的几何学原理
多生牙的位置,以
手术入路,然后拔除。
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The Seniors University of China (SUC) provides students with skills training, cultural inheritance education, social services, scientific research, and international exchanges, and offers both online and offline teaching activities for the elderly nationwide.
国家老年大学承担技能培训、文化传承、社会服务、科学研究和国际交流等任务,面向全国老年开展线上线下相结合的教学活动。